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Bathochromic shift
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Bathochromic shift : ウィキペディア英語版
Bathochromic shift
Bathochromic shift is a change of spectral band position in the absorption, reflectance, transmittance, or emission spectrum of a molecule to a longer wavelength (lower frequency).Because the red color in the visible spectrum has a longer wavelength than most other colors, this effect is also commonly called a ''red shift''.
This can occur because of a change in environmental conditions: for example, a change in solvent polarity will result in solvatochromism. A series of structurally related molecules in a substitution series can also show a bathochromic shift. Bathochromic shift is a phenomenon seen in ''molecular'' spectra, not ''atomic'' spectra; it is thus more common to speak of the movement of the peaks in the spectrum rather than lines.
:\Delta\lambda = \lambda^} - \lambda^} where \lambda is the wavelength of the spectral peak of interest and \lambda^} > \lambda^}
Bathochromic shift is typically demonstrated using a spectrophotometer, colorimeter, or spectroradiometer.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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